Dumping-bucket and hoisting mechanism therefor.



F. E. 'ARNDT.

DUMPING BUCKET AND HOISTING MECHANISM THEREFOR.

APPLICATION FILED APR. 8, 1914.

1,166,035. Patnted Dec.28,19'15.

COLUMBIA PLANOmiAPH co. WASHINGTON, D, c

'Galion, in the county rnrnwr option.

FRANKLIN E. ARNDT, OF GALION, OHIO, ASSIGNO'R TO THE GALION IRON WORKSAND MANUFACTURING COMPANY, GI YGALION, OHIO.

DUMPING-BUCKET AND HOISTING MECHANISM THEREFOR.

Specification of Letters Patent.

PatentedDec. 28, 1915.

Application filed April 8, 1914. -Seria11 To. 830,470.

To aZlw/wm it may concern Be it known that I, FRANKLIN E. ARNDT, citizenof the United States, residing at of Crawford and State of Ohio, haveinvented certain new and useful Improvements in Dumping-Buckets andHoisting Mechanism Therefor, of which the following is a specification.

My invention relates to lifting and unloading mechanisms, andparticularly to that type of apparatus wherein automatic dumping bucketsare used.

A special object of the invention is to improve the construction of thecarrier and the dropping mechanism therefor.

My invention is illustrated in the accompanying drawings wherein,

Figure 1 is a longitudinal vertical section of a portion of the trackbottom and the carrier thereon; Fig. 2 is a plan view of the blockengaging jaws.

The I-beam 18 constitutes a track upon which is mounted the shiftablecarriage 21 illustrated in detail in Fig. 1. This carriage is adapted toroll upon the flanges of the I-beam 18 and carries a pulley 22 overwhich passes a cable 23. One end of this cable is attached to thecarriage 21 in any suitable manner, as by the eye 24, and the other endof the cable, after passing over the pulley 22, extends longitudinallybeneath the I- beam 18 and passes around a sheave 25, then passes oversuitable guide pulleys to a winding drum of any ordinary form driven ina manner obvious to those skilled in the art. The cable 23, between thepulley 22 and the point of attachment 24 passes through a block 31 fromwhich a bucket is swingingly supported.

The carrier 21 is formed of oppositely disposed plates 48 which embracethe lower flanges of the I-bean1 18, and mounted in ears on these platesare the rollers 49 which ride upon the said flanges. The plates 48 areconnected by an integral transversely extending web 50 forming the floorof the carrier, this web being formed with a central opening 51having'downwardly and flange projecting from the lower edge of the wall52 opposed to the cars 54. Mounted upon the bottom web 50 of the carrierare the gage blocks or jaws 55. There are two of these blocks opposed toeach other and formed at their inner edges with mating recesses 56. Eachblock is formed at its forward end with the projection 57 which engagesin a pivoted clip 58 and is held therein by means of a cotter pin 59.The free ends of the blocks 55 have the upwardly projecting lugs 60 andthe blocks are drawn toward each other by means of a coiled spring 61.It will be obvious now that the blocks 55 may be spread apart from eachother so as to increase the diameter of the opening 56 and that thespring 61 will tend to draw the blocks together.

The forward end of the web 50 forming the bottom of the carrier has anupwardly projecting shoulder 62 which at its upper end is extendedforward and downward to form an inclined guiding face 63. Mounted uponthe I-beam 18 is a carrier latch 64 which is pivotally supported at 65in brackets extending downward from the bot tom of the I-beam. Theforward end of the latch 64 is extended outward and upward as at 66 soas to form a stop engageable with the bottom of the I-beam and the rearend of the latch is formed with a clownwardly extending shoulder 67adapted to engage over the shoulder 62 when the can rier is in theposition shown in Fig. 1. It will be observed also that this lockingpawl or latch 64 is extended beyond the shoulder 67 and is formed with arelatively wide lower face 68 disposed immediately above the opening 56in the locking blocks. See dotted lines in Fig. 1.

The block 31 through which the cable 23 passes, as shown, comprisesoppositely disposed plates within which the pulley or sheave 69 ismounted, the casting forming the block being provided at its lower endwith the eye 70 and at its upper end with the upwardly extendin shank 71formed with the enlarged head T2, this head being substantially conicalin form, and the greatest diameter of the head being greater than theopening 56. lVhen the cable 23 is drawn taut, this head 72 will beforced upward against the side Walls of the recess 56 and will force thejaws 55 apart against the tension of the spring 61 so that the head willcontact with the locking pawl or latch 64 to force it upward, causingthe shoulder 67 to release the shoulder 62 on the carrier and permittingmovement of the carrier. Upon the return of the carrier to the positionshown by Fig. 1 the extremity of the looking pawl or catch 6st willengage between the lugs 60 and will act tospread the blocks to releasethe cable block 31.

The carrier is normally urged to a posi tion upon the projectingextremity of the I-beam 18 by means of a counter-weight. Thiscounter-weightis mounted upon a cable 73 which is attached to one of thewebs 53 and passes over a convenient guide pulley to support thecounter-weight. The action of this counter-weight is to return thecarriage to the position shown in Fig. 1 after the bucket has beendischarged.

The operation of my invention is as follows: When the bucket has beenraised to such height that the head 72 is forced through the opening 56this head will unlatch the catch 6i, thus releasing the carrier 21 andthe continued pull upon the cable 23 will cause the carrier to travellaterally upon the track 18 until the bottom of the bucket is releasedwhen the weight of its contents will cause the opening of this bottomand the contents will be discharged. When the winding drum is releasedand allowed to run free, the counter-weight will cause the carrier andbucket to return upon the track. WVhen the carrier has returned nearlytoits normal position the extremity of the locking pawl will engage thelugs and act to spread the jaws or blocks 55. This action will releasethe block 31 and the weight of the bucket will cause the bucket to drop,whereupon the operation may be repeated.

It will be noted that the mechanism used by me is very simple andpositive in its action. It does not readily get out of order.

It has been found thoroughly effective in .practice and it does notrequire a large num floor oi the carrier and extending across theopening therein and provided with an upstanding lug at its free end,means at the free ends of the jaws for holding them nor mally closed, aload-sustaining block adapted to pass through the opening in the floorof the carrier to engage said jaws and be thereby locked to the carrier,and a latch pivotally hung on the track and having one arm normallyholding the carrier against movement and extending over the jaws toenter between the upstanding lugs thereon and thereby release said jawsfrom the block. 7

2. The combination of a track, a carrier mounted to travel thereon, apair of clips pivotally mounted in the carrier, opposed jaws each havingone end fitted in one of said clips, a spring disposed between andacting on the opposite free ends of the jaws to hold the same together,a load sustaining block adapted to engage said jaws and be therebylocked to the carrier, and means for separating the jaws to release saidblock.

In testimony whereof I affix my signature in presence of two witnesses.

FRANKLIN E. ARNDT. [L. s.]

Witnesses:

WV. J. GEEK,

GARDA HOLMES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

